vo: why won't romney level with us about his tax plan, which gives the wealth y huge new tax breaks? because according to experts, he'd have to raise taxes on the middle class - or increase the deficit to pay for it. if we can't trust him here... how could we ever trust him here? >> san francisco is considering allowing apartments around the same size as the when you see here, 150 square feet. cities like new yorker allowing the michael apartments that are of a parkinge space. >> imagine that tiny package a stand-alone house? greta kreuz introduces us to one 150 square foot home. >> you are in the great room. this is the living room. >> welcome to her tiny house. the main floor with the seating area, kitchen and bathroom. upstairs in the loft, an air mattress. thes a rebellion against mcmansions. >> not every kid needs his own play room. it is going back where you had with people. she built it for her master's .hesis is part of the online public university system. great to be able to see has done and how applied her degree program. >> the tiny, movement has grown and it is green. it